WO2019137734A1 - Système de transmission optique de données - Google Patents

Système de transmission optique de données Download PDF

Info

Publication number
WO2019137734A1
WO2019137734A1 PCT/EP2018/084833 EP2018084833W WO2019137734A1 WO 2019137734 A1 WO2019137734 A1 WO 2019137734A1 EP 2018084833 W EP2018084833 W EP 2018084833W WO 2019137734 A1 WO2019137734 A1 WO 2019137734A1
Authority
WO
WIPO (PCT)
Prior art keywords
wavelength
optical
optical data
receiver
data signal
Prior art date
Application number
PCT/EP2018/084833
Other languages
English (en)
Inventor
Andrew Lord
Original Assignee
British Telecommunications Public Limited Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Telecommunications Public Limited Company filed Critical British Telecommunications Public Limited Company
Priority to US15/733,354 priority Critical patent/US11316593B2/en
Priority to CN201880080962.9A priority patent/CN111492599A/zh
Priority to EP18814979.3A priority patent/EP3738228A1/fr
Publication of WO2019137734A1 publication Critical patent/WO2019137734A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/70—Photonic quantum communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/297—Bidirectional amplification

Definitions

  • the present invention relates to optical communication in general and to the communication of a single-photon (e.g. QKD) signal.
  • a single-photon e.g. QKD
  • Secure transmission of data over an optical fibre may be achieved by using one or more encryption keys to encrypt data and then transporting the key and the encrypted data between the same end points.
  • the data transport can be via an entirely different path and even over a different transmission medium to the key.
  • Different optical wavelengths will experience different levels of attenuation over commercially-available optical fibres with the transmission of data conventionally taking advantage of wavelengths that experience the lowest- attenuation.
  • Quantum-key distribution uses quantum principles to establish a completely secure method of transporting keys. The technique relies on modulating single photons and then transporting them over an optical fibre. Attenuation experienced during transmission of QKD streams over an optical fibre reduces the number of photons reaching the receiver. The rate at which photons are received determines the eventual key rate and, if attenuation is too high, QKD may become unworkable.
  • Data transmission over optical fibre generally makes use of the 1.5um optical wavelength band because of the lower loss and vendors of optical communication equipment widely produce equipment for data transmission at 1 5um.
  • optical amplifiers for 1 5um wavelengths (known as Erbium doped fibre amplifiers (EDFAs)) are widely available.
  • EDFAs Erbium doped fibre amplifiers
  • Data can be sent simultaneously over multiple wavelengths on an optical fibre, all in the 1 .5um optical wavelength band and this is known as Dense Wavelength Division Multiplexing (DWDM).
  • DWDM Dense Wavelength Division Multiplexing
  • a conventional solution for transmitting QKD keys and data on the same fibre is to transport the QKD keys over the next-best choice wavelength, i.e. 1 .3um, but the QKD keys are more sensitive to attenuation than the data.
  • Another solution is to have both QKD keys and data transported at 1 .5um and to deploy advanced techniques to limit interference.
  • These advanced techniques may include significantly reducing the data channel power levels and providing advanced filtering of the QKD channel - for example time filtering in which the receiver is gated to accept photons only in pre-allocated time slots.
  • time filtering has proved difficult to implement in commercial optical networks.
  • the present invention accordingly provides in a first aspect an optical data transmission system comprising an optical transmitter and an optical receiver connected by an optical path, in which the optical path is configured to carry optical signals at different wavelengths; in which the optical path attenuates signals at a first wavelength less than it attenuates signals at a second wavelength.
  • the transmitter is configured to convert to the second wavelength, an optical data signal at the first wavelength and to transmit, at the second wavelength, the optical data signal to the receiver over the path and the transmitter is configured to transmit to the receiver over the path at the first wavelength, a single-photon signal comprising a stream of single photons.
  • the receiver is configured to receive the single-photon signal at the first wavelength and the optical data signal at the second wavelength and to convert the optical data signal to the first wavelength for detection.
  • single-photon signals such as QKD keys
  • QKD keys that are more sensitive to attenuation than data signals
  • the invention results in increased range and reliability for QKD systems.
  • the present invention accordingly provides in a second aspect a method of optical data transmission comprising, at an optical transmitter: converting to a second wavelength, an optical data signal at a first wavelength; transmitting at the second wavelength, the optical data signal to an optical receiver over an optical path; and transmitting at the first wavelength, to the receiver over the path a single-photon signal comprising a stream of single photons.
  • the optical path is configured to carry optical signals at different wavelengths and the optical path attenuates signals at the first wavelength less than it attenuates signals at the second wavelength.
  • the method further comprises, at the receiver: receiving the single-photon signal at the first wavelength and receiving the optical data signal at the second wavelength; and converting the optical data signal to the first wavelength for detection.
  • Figure 1 shows schematically an exemplary optical transmitter
  • Figure 2 shows schematically an exemplary optical repeater
  • Figure 3 shows schematically an exemplary optical receiver.
  • Optical Phase Conjugation is used in an embodiment of the invention to shift the transmission of data from a low-loss, optical transmission band (often this is the 1.5um C optical wavelength band) to another optical wavelength band, for example, the L or O optical wavelength band, thus freeing up the C optical wavelength band for QKD transmission that then benefits from the lower loss of the fibre in this optical wavelength band.
  • This can improve transmission distances for QKD signals by approximately 50% compared to existing techniques, while still supporting viable optical data transmission.
  • the technique can be implemented in modified existing commercial optical networks using widely available vendor equipment.
  • conventional DWDM equipment may be used to generate, in the normal way, data signals that are then wavelength-shifted by use of Optical Phase Conjugation and conventional DWDM equipment may be used to detect, in the normal way, data signals that have experienced two, successive wavelength-shifts by use of Optical Phase Conjugation.
  • a first optical phase conjugator is employed to shift the optical wavelengths used to transport data from 1 5um to 1 3um.
  • the data is then transmitted at 1 .3um, freeing up the 1.5um optical wavelength band for transmission of QKD keys.
  • a second Optical Phase Conjugator OPC is employed to shift the data back to 1 .5um for detection, thereby allowing standard optical communication equipment to be used.
  • the first optical phase conjugator mixes the optical data signals at 1.5um with a high power pump signal at a selected wavelength and exploits a special non-linear optical fibre (the OPC fibre) to generate new wavelengths through a nonlinear process (such as Four Wave Mixing).
  • OPC fibre non-linear optical fibre
  • an optical filter may be provided to remove from the transmission path any residual data signal at 1 .5um. Another result is that the data signal spectrum is inverted so that higher wavelength components become lower wavelength components and vice versa.
  • Figure 1 shows details of an optical transmitter 100, located at one end of optical fibre transmission system 136.
  • a number of spectral windows are included in the Figures to provide approximate indications of the spectrum of optical signals at various points in optical paths.
  • conventional DWDM equipment transponder bank 1 10 (i.e. a rack of optical transponders), multiplexer 1 12 and EDFA 1 14) is used to generate data signals at 1 .5um on optical fibre 1 16.
  • the data signals in the 1 .5um optical wavelength band are fed into optical phase conjugator 130 that inverts the data spectrum as shown schematically in spectral window 106, moving the data signal from 1.5um to 1.3um.
  • the conventional DWDM equipment (transponder bank 1 10 (i.e. a rack of optical transponders), multiplexer 1 12 and EDFA 1 14) used to generate data signals at 1.5um on optical fibre 1 16 a may be located at a different optical node (not shown).
  • the data signals at 1 .5um fed into optical phase conjugator 130 are received over a further optical path (not shown) from the different optical node.
  • conventional QKD equipment 120 is used to generate on optical fibre 126, a QKD signal (shown in broken line) that is also generated at 1 5um.
  • a 1 .3/1 .5um multiplexer 132 combines the shifted (1.3um) data signals and the original (1.5um) QKD signal for transmission on optical fibre transmission system 136.
  • the combined shifted data signals at 1 .3um and QKD signal at 1 .5um (broken line) are shown in spectral window 108.
  • Figure 2 shows details of an optional repeater 200 that may be located at an intermediate point along optical fibre transmission system 136.
  • the QKD signal and data signals are separated at 1 .3/1.5um demultiplexer 210.
  • the QKD signal is sent to trusted node 212 where the signal is regenerated. Regeneration involves detecting the stream of photons received on an input fibre and generating an equivalent stream of photons on an output fibre.
  • the data signals are sent to optical amplifier 214 for amplification.
  • the optical amplifier 214 uses different technologies that are available, that provide amplification at 1 .3um (for example amplifiers based on different glass dopants, such as Praseodymium Doped Fibre Amplifiers, or Raman amplification). Finally the regenerated and amplified signals are recombined at 1.3/1 .5um multiplexer 216 for onward transmission.
  • Figure 3 shows details of an optical receiver 300 that may be located on optical fibre transmission system 136 at the opposite end from transmitter 100.
  • the combined shifted data signals at 1 .3um and QKD signal at 1.5um are received at 1 .3/1 .5um demultiplexer 310 over optical fibre transmission system 136.
  • 1.3/1.5um demultiplexer 310 separates the received signals and sends the shifted data signals at 1.3um (as shown schematically in spectral window 304) to second optical phase conjugator 312 where the data spectrum is inverted for a second time as shown schematically in spectral window 306, moving the data signal from 1 .3um to 1 .5um.
  • Optical phase conjugator 312 passes the newly-inverted data spectrum to conventional DWDM equipment (EDFA 314, demultiplexer 316 and transponder bank 318) used to detect the data signals at 1.5um.
  • 1.3/1 .5um demultiplexer 310 also sends the QKD signal at 1 .5um to QKD receiver 320, where the single photons are detected. Full QKD system signalling can therefore be implemented between transmit and receive nodes, for example, to share QKD keys.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Computer Security & Cryptography (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un système et un procédé de transmission optique de données permettant, au niveau d'un émetteur optique : de convertir en une seconde longueur d'onde un signal optique de données à une première longueur d'onde ; de transmettre à la seconde longueur d'onde le signal optique de données à un récepteur optique sur un trajet optique ; et de transmettre à la première longueur d'onde, au récepteur sur le trajet, un signal à photon unique comprenant un flux de photons uniques. Le trajet optique est configuré pour transporter des signaux optiques à différentes longueurs d'onde et le trajet optique atténue moins des signaux à la première longueur d'onde qu'il n'atténue des signaux à la seconde longueur d'onde. Le système et le procédé de transmission optique de données permettent, au niveau du récepteur : de recevoir le signal de photon unique à la première longueur d'onde et de recevoir le signal optique de données à la seconde longueur d'onde ; et de convertir le signal optique de données en la première longueur d'onde à des fins de détection.
PCT/EP2018/084833 2018-01-09 2018-12-13 Système de transmission optique de données WO2019137734A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US15/733,354 US11316593B2 (en) 2018-01-09 2018-12-13 Optical DWDM data and QKD transmission system
CN201880080962.9A CN111492599A (zh) 2018-01-09 2018-12-13 光数据传输系统
EP18814979.3A EP3738228A1 (fr) 2018-01-09 2018-12-13 Système de transmission optique de données

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18150872.2 2018-01-09
EP18150872 2018-01-09

Publications (1)

Publication Number Publication Date
WO2019137734A1 true WO2019137734A1 (fr) 2019-07-18

Family

ID=60953737

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/084833 WO2019137734A1 (fr) 2018-01-09 2018-12-13 Système de transmission optique de données

Country Status (4)

Country Link
US (1) US11316593B2 (fr)
EP (1) EP3738228A1 (fr)
CN (1) CN111492599A (fr)
WO (1) WO2019137734A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0801452A2 (fr) * 1996-04-11 1997-10-15 Fujitsu Limited Dispositif et méthode pour la génération de lumière conjugée en phase et pour la conversion de longueur d'onde, et système comportant un tel dispositif
US7248695B1 (en) * 2006-02-10 2007-07-24 Magiq Technologies, Inc. Systems and methods for transmitting quantum and classical signals over an optical network
EP2485429A2 (fr) * 2009-09-28 2012-08-08 Telefónica, S.A. Système d'intégration de canaux d'information quantique dans des réseaux de communication

Family Cites Families (77)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477699A3 (en) 1990-09-14 1993-09-01 Fujitsu Limited Optical communication system
US6233077B1 (en) 1995-05-11 2001-05-15 Ciena Corporation Remodulating channel selectors for WDM optical communication systems
JPH09321701A (ja) 1996-05-31 1997-12-12 Fujitsu Ltd 光通信システム及び光増幅器
US5762788A (en) 1996-08-12 1998-06-09 Caterpillar Inc. Fluid filter having a reusable filter housing and a replaceable coreless filter element
EP1017242B1 (fr) 1998-12-28 2007-01-31 STMicroelectronics S.r.l. Architecture d' interconnexion optique pour des systèmes de télécommunication MRL (WDM)
US6661973B1 (en) 1999-06-04 2003-12-09 David R. Huber Optical transmission systems, apparatuses, and methods
JP4592170B2 (ja) 2000-10-18 2010-12-01 株式会社東芝 光伝送装置
JP3744343B2 (ja) 2000-11-08 2006-02-08 日本電気株式会社 光クロスコネクト装置
US20020174207A1 (en) 2001-02-28 2002-11-21 Abdella Battou Self-healing hierarchical network management system, and methods and apparatus therefor
CA2340148A1 (fr) 2001-03-09 2002-09-09 Stylianos Derventzis Commutateur optique pour signaux d'acheminement, et reseau integrant ledit commutateur
US6574386B1 (en) 2001-04-20 2003-06-03 Transparent Networks, Inc. Dynamically reconfigurable optical switching system
US20030202770A1 (en) * 2002-01-03 2003-10-30 Garito Anthony F. Optical waveguide amplifiers
US7027732B2 (en) 2002-01-18 2006-04-11 Pts Corporation WDM cross-connects for core optical networks
US6792208B1 (en) 2002-07-26 2004-09-14 The Regents Of The University Of California Method and apparatus for hierarchical optical switching
GB0322859D0 (en) 2003-09-30 2003-10-29 British Telecomm Communication
US7667849B2 (en) 2003-09-30 2010-02-23 British Telecommunications Public Limited Company Optical sensor with interferometer for sensing external physical disturbance of optical communications link
GB0407386D0 (en) 2004-03-31 2004-05-05 British Telecomm Monitoring a communications link
WO2006014298A2 (fr) 2004-07-02 2006-02-09 Magiq Technologies, Inc. Reseau en cascade de distribution de code quantique possedant une capacite de rebouclage
GB0416107D0 (en) 2004-07-19 2004-08-18 British Telecomm Wavelength selection
JP4709764B2 (ja) 2004-09-17 2011-06-22 富士通株式会社 光挿入分岐装置
GB0421747D0 (en) 2004-09-30 2004-11-03 British Telecomm Distributed backscattering
US7848645B2 (en) 2004-09-30 2010-12-07 British Telecommunications Public Limited Company Identifying or locating waveguides
CA2589792A1 (fr) 2004-12-17 2006-06-22 British Telecommunications Public Limited Company Evaluation d'un reseau
GB0427733D0 (en) 2004-12-17 2005-01-19 British Telecomm Optical system
GB0504579D0 (en) 2005-03-04 2005-04-13 British Telecomm Communications system
EP1853964B1 (fr) 2005-03-04 2009-06-24 British Telecommunications Public Limited Company Modulateur acousto-optique
EP1708388A1 (fr) 2005-03-31 2006-10-04 British Telecommunications Public Limited Company Communication d'information
EP1713301A1 (fr) 2005-04-14 2006-10-18 BRITISH TELECOMMUNICATIONS public limited company Procédé et dispositif pour communiquer du son sur une liaison optique
EP1729096A1 (fr) 2005-06-02 2006-12-06 BRITISH TELECOMMUNICATIONS public limited company Méthode et dispositif de détermination de la position d'une perturbation dans une fibre optique
US7889868B2 (en) 2005-09-30 2011-02-15 Verizon Business Global Llc Quantum key distribution system
US20070133798A1 (en) 2005-12-14 2007-06-14 Elliott Brig B Quantum cryptography on a multi-drop optical network
EP1826924A1 (fr) 2006-02-24 2007-08-29 BRITISH TELECOMMUNICATIONS public limited company Sensation d'une perturbation
US7961331B2 (en) 2006-02-24 2011-06-14 British Telecommunications Public Limited Company Sensing a disturbance along an optical path
CA2643344A1 (fr) 2006-02-24 2007-08-30 British Telecommunications Public Limited Company Detection d'une perturbation
US7809268B2 (en) 2006-03-13 2010-10-05 Cisco Technology, Inc. Integrated optical service channel and quantum key distribution channel
WO2007113527A1 (fr) 2006-04-03 2007-10-11 British Telecommunications Public Limited Company Évaluation de la position d'une perturbation
US20080137858A1 (en) * 2006-12-06 2008-06-12 Magiq Technologies, Inc. Single-channel transmission of qubits and classical bits over an optical telecommunications network
US20090047019A1 (en) 2007-08-13 2009-02-19 Paparao Palacharla Method and System for Communicating Optical Traffic
US8320759B2 (en) 2008-03-05 2012-11-27 Tellabs Operations, Inc. Methods and apparatus for reconfigurable add drop multiplexers
US8625994B2 (en) 2008-03-11 2014-01-07 Ciena Corporation Directionless reconfigurable optical add-drop multiplexer systems and methods
US8483391B2 (en) 2008-03-13 2013-07-09 University College Cork, National University Of Ireland, Cork Optical communication system and method for secure data communication using quantum key distribution
US20110164876A1 (en) 2008-10-02 2011-07-07 Enablence USA Components, Inc. Directionless reconfigurable optical add/drop multiplexer
US8515278B2 (en) 2008-10-31 2013-08-20 Futurewei Technologies, Inc. Passive optical networks with mode coupling receivers
CN101742363A (zh) 2008-11-20 2010-06-16 华为技术有限公司 一种光交换的方法和装置
GB0917060D0 (en) * 2009-09-29 2009-11-11 Qinetiq Ltd Methods and apparatus for use in quantum key distribution
US8483562B2 (en) 2009-11-11 2013-07-09 Verizon Patent And Licensing Inc. Method and apparatus for integrating automated switching in a passive optical network
US8774632B2 (en) 2010-04-27 2014-07-08 Ciena Corporation Reconfigurable optical add drop multiplexer node automated topology discovery systems and methods
JP2012028929A (ja) 2010-07-21 2012-02-09 Sun Tec Kk 波長選択光クロスコネクト装置
US20120087661A1 (en) 2010-10-12 2012-04-12 Christopher Michael Look Long Distance Transmission Of Incoherent Optical Signals In An Optical Network
JP5776330B2 (ja) 2011-05-25 2015-09-09 富士通株式会社 波長再配置方法及びノード装置
WO2012175913A1 (fr) 2011-06-20 2012-12-27 British Telecommunications Public Limited Company Réseau de communication
IL214391A0 (en) 2011-08-01 2011-09-27 Eci Telecom Ltd A method and network node for improving bandwidth efficiency in an optical network
US8693873B2 (en) 2011-12-02 2014-04-08 At&T Intellectual Property I, L.P. Apparatus and method for improved distributed compensation of filtering effects mitigation in an optical network
EP2847897B1 (fr) 2012-05-10 2018-08-08 Telefonaktiebolaget LM Ericsson (publ) Noeud et procédé d'amélioration itérative d'utilisation spectrale
EP2680606A1 (fr) 2012-06-29 2014-01-01 British Telecommunications Public Limited Company Routage de signaux optiques
CN104737491A (zh) * 2012-10-15 2015-06-24 诺基亚技术有限公司 量子密钥分配
EP2775733A1 (fr) 2013-03-05 2014-09-10 British Telecommunications public limited company Réseau de communications
GB201305818D0 (en) 2013-03-28 2013-05-15 British Telecomm Signal routing
GB201305801D0 (en) 2013-03-28 2013-05-15 British Telecomm Optical switch
GB201305985D0 (en) 2013-04-03 2013-05-15 British Telecomm Optical switch
EP2797247A1 (fr) 2013-04-24 2014-10-29 British Telecommunications Public Limited Company Transmission de données optiques
GB2514134B (en) 2013-05-14 2016-05-25 Toshiba Res Europe Ltd A signal manipulator for a quantum communication system
WO2015048783A1 (fr) 2013-09-30 2015-04-02 Nordholt, Jane, E. Recouvrement de communications sécurisées quantiques pour des réseaux de communication par fibre optique
GB2533745A (en) 2013-10-11 2016-06-29 British Telecomm Optical data transmission method and apparatus
EP3085006B1 (fr) * 2013-12-16 2021-08-18 Nokia Technologies Oy Procédé et appareil de cryptographie quantique
CN103929251B (zh) 2014-04-22 2017-05-24 华南师范大学 一种低噪声qkd与wdm经典通信网兼容的方法及装置
CN104092538B (zh) 2014-07-15 2017-04-12 华南师范大学 多用户波分复用qkd网络系统及其密钥分发与共享方法
GB2534917B (en) 2015-02-05 2017-09-27 Toshiba Res Europe Ltd A quantum communication system and a quantum communication method
EP3335368B1 (fr) 2015-08-14 2022-08-03 Nokia Technologies Oy Système de distribution de clé quantique variable en continu sur puce avec multiplexage en polarisation et par répartition en fréquence
CN107465502A (zh) * 2016-06-02 2017-12-12 华为技术有限公司 一种量子通信方法和相关装置
EP3519874A1 (fr) 2016-09-30 2019-08-07 British Telecommunications Public Limited Company Joint de fibre optique
WO2018141681A1 (fr) 2017-02-01 2018-08-09 British Telecommunications Public Limited Company Localisation d'événement de fibre optique
CN107040376A (zh) * 2017-05-18 2017-08-11 烽火通信科技股份有限公司 一种量子保密光通信的方法及系统
WO2019016263A1 (fr) 2017-07-20 2019-01-24 British Telecommunications Public Limited Company Fibre optique
CN107528639B (zh) * 2017-09-06 2022-09-16 安徽问天量子科技股份有限公司 量子光与经典光共纤传输装置及其传输方法
EP3685530B1 (fr) 2017-09-19 2021-09-15 British Telecommunications Public Limited Company Récepteur optique à couplage de modes pour communication quantiques et système de communication quantique comprenant ledit récepteur
JP7047338B2 (ja) * 2017-11-16 2022-04-05 富士通株式会社 光伝送装置、光伝送システム、及び励起光周波数の制御方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0801452A2 (fr) * 1996-04-11 1997-10-15 Fujitsu Limited Dispositif et méthode pour la génération de lumière conjugée en phase et pour la conversion de longueur d'onde, et système comportant un tel dispositif
US7248695B1 (en) * 2006-02-10 2007-07-24 Magiq Technologies, Inc. Systems and methods for transmitting quantum and classical signals over an optical network
EP2485429A2 (fr) * 2009-09-28 2012-08-08 Telefónica, S.A. Système d'intégration de canaux d'information quantique dans des réseaux de communication

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHAPURAN T E ET AL: "Compatibility of quantum key distribution with optical networking", VISUAL COMMUNICATIONS AND IMAGE PROCESSING; 20-1-2004 - 20-1-2004; SAN JOSE,, vol. 5815, no. 164 (2005), 2 June 2005 (2005-06-02), pages 164 - 175, XP002602792, ISBN: 978-1-62841-730-2, DOI: 10.1117/12.603640 *
JANSEN, S. L.: "Optical phase conjugation in fiber-optic transmission systems", 2006, TECHNISCHE UNIVERSITEIT EINDHOVEN

Also Published As

Publication number Publication date
US20200350995A1 (en) 2020-11-05
CN111492599A (zh) 2020-08-04
EP3738228A1 (fr) 2020-11-18
US11316593B2 (en) 2022-04-26

Similar Documents

Publication Publication Date Title
US7248695B1 (en) Systems and methods for transmitting quantum and classical signals over an optical network
US7613396B2 (en) Multiplexing communication system and crosstalk elimination method
JP6866977B2 (ja) 量子通信用の送信装置、システム、及び量子通信方法
US7359514B2 (en) Narrow-band single-photon source and QKD system using same
JP4584257B2 (ja) 光パフォーマンス監視方法及びシステム
US8750707B2 (en) System and method for establishing secure communications between transceivers in undersea optical communication systems
CN107135066B (zh) 一种原始密钥恢复装置和方法
CN106533565A (zh) 量子保密通信方法和装置
US20140341575A1 (en) Signal manipulator for a quantum communication system
JP2007502085A6 (ja) 光パフォーマンス監視方法及びシステム
Fitzke et al. Scalable network for simultaneous pairwise quantum key distribution via entanglement-based time-bin coding
Nweke et al. Experimental characterization of the separation between wavelength-multiplexed quantum and classical communication channels
US11789206B2 (en) Secured fiber link system
JP2022535712A (ja) ハイブリッド量子チャネルを介した量子鍵配送のシステム及び方法
CZ90696A3 (en) Method of optical telecommunication executed by a transmitting and receiving service channel
JP2013509136A (ja) コヒーレントチャネル及び非コヒーレントチャネルのための別個の分散補償
US11316593B2 (en) Optical DWDM data and QKD transmission system
EP3413482A1 (fr) Dispositif de détection d'interruption de signal lumineux, amplificateur optique, appareil et système de transmission par multiplexage optique en longueur d'onde
GB2570109A (en) Optical data transmission system
Wu et al. Phase-mask covered optical steganography based on amplified spontaneous emission noise
Abbade et al. Double all-optical encryption of M-QAM signals based on spectrally sliced encoding keys
US20220376905A1 (en) Combining qkd and classical communication
JP2002164883A (ja) 光秘話通信方法および装置
Shields et al. Realising scalable, commercial quantum networks
US20050200945A1 (en) Optical fiber communication systems with brillouin effect amplification

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18814979

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018814979

Country of ref document: EP

Effective date: 20200810